<!DOCTYPE html>
<html>
<head>
<style type="text/css">
  #div > div { text-indent: 0 }
  div > div > div { display: inline-block; width: 30px; }
  body > div > div { text-decoration: underline; }
</style>
<body>
<div style="height: 20px; line-height: 20px; -moz-column-width: 100px;
            -moz-column-gap: 0px">
<div id="div" style="text-indent: 30px;">
  <div>a</div>
  <div>a</div>
</div>
<div>
  <div>a</div>
  <div>a</div>
  <div>a</div>
</div>
<div>
  <div>a</div>
  <div>a</div>
  <div>a</div>
</div>
<div>
  <div style="width: 100px">b</div>
</div>
</div>
</body>
</html>
